## SAX2

SAX2 - SAX2 parser interface used to build the DOM tree

those are the default SAX2 interfaces used by the library when building DOM tree.

Author(s): Daniel Veillard

## Synopsis

    void	htmlDefaultSAXHandlerInit	(void);
    void	xmlDefaultSAXHandlerInit	(void);
    void	xmlSAX2AttributeDecl		(void * ctx,
    					 const xmlChar * elem,
    					 const xmlChar * fullname,
    					 int type,
    					 int def,
    					 const xmlChar * defaultValue,
    					 xmlEnumerationPtr tree);
    void	xmlSAX2CDataBlock		(void * ctx,
    					 const xmlChar * value,
    					 int len);
    void	xmlSAX2Characters		(void * ctx,
    					 const xmlChar * ch,
    					 int len);
    void	xmlSAX2Comment			(void * ctx,
    					 const xmlChar * value);
    void	xmlSAX2ElementDecl		(void * ctx,
    					 const xmlChar * name,
    					 int type,
    					 xmlElementContentPtr content);
    void	xmlSAX2EndDocument		(void * ctx);
    void	xmlSAX2EndElement		(void * ctx,
    					 const xmlChar * name);
    void	xmlSAX2EndElementNs		(void * ctx,
    					 const xmlChar * localname,
    					 const xmlChar * prefix,
    					 const xmlChar * URI);
    void	xmlSAX2EntityDecl		(void * ctx,
    					 const xmlChar * name,
    					 int type,
    					 const xmlChar * publicId,
    					 const xmlChar * systemId,
    					 xmlChar * content);
    void	xmlSAX2ExternalSubset		(void * ctx,
    					 const xmlChar * name,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID);
    int	xmlSAX2GetColumnNumber		(void * ctx);
    xmlEntityPtr	xmlSAX2GetEntity	(void * ctx,
    					 const xmlChar * name);
    int	xmlSAX2GetLineNumber		(void * ctx);
    xmlEntityPtr	xmlSAX2GetParameterEntity	(void * ctx,
    						 const xmlChar * name);
    const xmlChar *	xmlSAX2GetPublicId	(void * ctx);
    const xmlChar *	xmlSAX2GetSystemId	(void * ctx);
    int	xmlSAX2HasExternalSubset	(void * ctx);
    int	xmlSAX2HasInternalSubset	(void * ctx);
    void	xmlSAX2IgnorableWhitespace	(void * ctx,
    					 const xmlChar * ch,
    					 int len);
    void	xmlSAX2InitDefaultSAXHandler	(xmlSAXHandler * hdlr,
    					 int warning);
    void	xmlSAX2InitHtmlDefaultSAXHandler	(xmlSAXHandler * hdlr);
    void	xmlSAX2InternalSubset		(void * ctx,
    					 const xmlChar * name,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID);
    int	xmlSAX2IsStandalone		(void * ctx);
    void	xmlSAX2NotationDecl		(void * ctx,
    					 const xmlChar * name,
    					 const xmlChar * publicId,
    					 const xmlChar * systemId);
    void	xmlSAX2ProcessingInstruction	(void * ctx,
    					 const xmlChar * target,
    					 const xmlChar * data);
    void	xmlSAX2Reference		(void * ctx,
    					 const xmlChar * name);
    xmlParserInputPtr	xmlSAX2ResolveEntity	(void * ctx,
    						 const xmlChar * publicId,
    						 const xmlChar * systemId);
    void	xmlSAX2SetDocumentLocator	(void * ctx,
    					 xmlSAXLocatorPtr loc);
    void	xmlSAX2StartDocument		(void * ctx);
    void	xmlSAX2StartElement		(void * ctx,
    					 const xmlChar * fullname,
    					 const xmlChar ** atts);
    void	xmlSAX2StartElementNs		(void * ctx,
    					 const xmlChar * localname,
    					 const xmlChar * prefix,
    					 const xmlChar * URI,
    					 int nb_namespaces,
    					 const xmlChar ** namespaces,
    					 int nb_attributes,
    					 int nb_defaulted,
    					 const xmlChar ** attributes);
    void	xmlSAX2UnparsedEntityDecl	(void * ctx,
    					 const xmlChar * name,
    					 const xmlChar * publicId,
    					 const xmlChar * systemId,
    					 const xmlChar * notationName);
    int	xmlSAXDefaultVersion		(int version);
    int	xmlSAXVersion			(xmlSAXHandler * hdlr,
    					 int version);

## Description

## Details

### htmlDefaultSAXHandlerInit ()

    void	htmlDefaultSAXHandlerInit	(void)

DEPRECATED: This function will be made private. Call xmlInitParser to initialize the library. Initialize the default SAX handler

### xmlDefaultSAXHandlerInit ()

    void	xmlDefaultSAXHandlerInit	(void)

DEPRECATED: This function will be made private. Call xmlInitParser to initialize the library. Initialize the default SAX2 handler

### xmlSAX2AttributeDecl ()

    void	xmlSAX2AttributeDecl		(void * ctx,
    					 const xmlChar * elem,
    					 const xmlChar * fullname,
    					 int type,
    					 int def,
    					 const xmlChar * defaultValue,
    					 xmlEnumerationPtr tree)

An attribute definition has been parsed

`ctx`: | the user data (XML parser context)
`elem`: | the name of the element
`fullname`: | the attribute name
`type`: | the attribute type
`def`: | the type of default value
`defaultValue`: | the attribute default value
`tree`: | the tree of enumerated value set

### xmlSAX2CDataBlock ()

    void	xmlSAX2CDataBlock		(void * ctx,
    					 const xmlChar * value,
    					 int len)

called when a pcdata block has been parsed

`ctx`: | the user data (XML parser context)
`value`: | The pcdata content
`len`: | the block length

### xmlSAX2Characters ()

    void	xmlSAX2Characters		(void * ctx,
    					 const xmlChar * ch,
    					 int len)

receiving some chars from the parser.

`ctx`: | the user data (XML parser context)
`ch`: | a xmlChar string
`len`: | the number of xmlChar

### xmlSAX2Comment ()

    void	xmlSAX2Comment			(void * ctx,
    					 const xmlChar * value)

A xmlSAX2Comment has been parsed.

`ctx`: | the user data (XML parser context)
`value`: | the xmlSAX2Comment content

### xmlSAX2ElementDecl ()

    void	xmlSAX2ElementDecl		(void * ctx,
    					 const xmlChar * name,
    					 int type,
    					 xmlElementContentPtr content)

An element definition has been parsed

`ctx`: | the user data (XML parser context)
`name`: | the element name
`type`: | the element type
`content`: | the element value tree

### xmlSAX2EndDocument ()

    void	xmlSAX2EndDocument		(void * ctx)

called when the document end has been detected.

`ctx`: | the user data (XML parser context)

### xmlSAX2EndElement ()

    void	xmlSAX2EndElement		(void * ctx,
    					 const xmlChar * name)

called when the end of an element has been detected.

`ctx`: | the user data (XML parser context)
`name`: | The element name

### xmlSAX2EndElementNs ()

    void	xmlSAX2EndElementNs		(void * ctx,
    					 const xmlChar * localname,
    					 const xmlChar * prefix,
    					 const xmlChar * URI)

SAX2 callback when an element end has been detected by the parser. It provides the namespace information for the element.

`ctx`: | the user data (XML parser context)
`localname`: | the local name of the element
`prefix`: | the element namespace prefix if available
`URI`: | the element namespace name if available

### xmlSAX2EntityDecl ()

    void	xmlSAX2EntityDecl		(void * ctx,
    					 const xmlChar * name,
    					 int type,
    					 const xmlChar * publicId,
    					 const xmlChar * systemId,
    					 xmlChar * content)

An entity definition has been parsed

`ctx`: | the user data (XML parser context)
`name`: | the entity name
`type`: | the entity type
`publicId`: | The public ID of the entity
`systemId`: | The system ID of the entity
`content`: | the entity value (without processing).

### xmlSAX2ExternalSubset ()

    void	xmlSAX2ExternalSubset		(void * ctx,
    					 const xmlChar * name,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID)

Callback on external subset declaration.

`ctx`: | the user data (XML parser context)
`name`: | the root element name
`ExternalID`: | the external ID
`SystemID`: | the SYSTEM ID (e.g. filename or URL)

### xmlSAX2GetColumnNumber ()

    int	xmlSAX2GetColumnNumber		(void * ctx)

Provide the column number of the current parsing point.

`ctx`: | the user data (XML parser context)
`Returns`: | an int

### xmlSAX2GetEntity ()

    xmlEntityPtr	xmlSAX2GetEntity	(void * ctx,
    					 const xmlChar * name)

Get an entity by name

`ctx`: | the user data (XML parser context)
`name`: | The entity name
`Returns`: | the xmlEntityPtr if found.

### xmlSAX2GetLineNumber ()

    int	xmlSAX2GetLineNumber		(void * ctx)

Provide the line number of the current parsing point.

`ctx`: | the user data (XML parser context)
`Returns`: | an int

### xmlSAX2GetParameterEntity ()

    xmlEntityPtr	xmlSAX2GetParameterEntity	(void * ctx,
    						 const xmlChar * name)

Get a parameter entity by name

`ctx`: | the user data (XML parser context)
`name`: | The entity name
`Returns`: | the xmlEntityPtr if found.

### xmlSAX2GetPublicId ()

    const xmlChar *	xmlSAX2GetPublicId	(void * ctx)

Provides the public ID e.g. "-//SGMLSOURCE//DTD DEMO//EN"

`ctx`: | the user data (XML parser context)
`Returns`: | a xmlChar *

### xmlSAX2GetSystemId ()

    const xmlChar *	xmlSAX2GetSystemId	(void * ctx)

Provides the system ID, basically URL or filename e.g. http://www.sgmlsource.com/dtds/memo.dtd

`ctx`: | the user data (XML parser context)
`Returns`: | a xmlChar *

### xmlSAX2HasExternalSubset ()

    int	xmlSAX2HasExternalSubset	(void * ctx)

Does this document has an external subset

`ctx`: | the user data (XML parser context)
`Returns`: | 1 if true

### xmlSAX2HasInternalSubset ()

    int	xmlSAX2HasInternalSubset	(void * ctx)

Does this document has an internal subset

`ctx`: | the user data (XML parser context)
`Returns`: | 1 if true

### xmlSAX2IgnorableWhitespace ()

    void	xmlSAX2IgnorableWhitespace	(void * ctx,
    					 const xmlChar * ch,
    					 int len)

receiving some ignorable whitespaces from the parser. UNUSED: by default the DOM building will use xmlSAX2Characters

`ctx`: | the user data (XML parser context)
`ch`: | a xmlChar string
`len`: | the number of xmlChar

### xmlSAX2InitDefaultSAXHandler ()

    void	xmlSAX2InitDefaultSAXHandler	(xmlSAXHandler * hdlr,
    					 int warning)

Initialize the default XML SAX2 handler

`hdlr`: | the SAX handler
`warning`: | flag if non-zero sets the handler warning procedure

### xmlSAX2InitHtmlDefaultSAXHandler ()

    void	xmlSAX2InitHtmlDefaultSAXHandler	(xmlSAXHandler * hdlr)

Initialize the default HTML SAX2 handler

`hdlr`: | the SAX handler

### xmlSAX2InternalSubset ()

    void	xmlSAX2InternalSubset		(void * ctx,
    					 const xmlChar * name,
    					 const xmlChar * ExternalID,
    					 const xmlChar * SystemID)

Callback on internal subset declaration.

`ctx`: | the user data (XML parser context)
`name`: | the root element name
`ExternalID`: | the external ID
`SystemID`: | the SYSTEM ID (e.g. filename or URL)

### xmlSAX2IsStandalone ()

    int	xmlSAX2IsStandalone		(void * ctx)

Is this document tagged standalone ?

`ctx`: | the user data (XML parser context)
`Returns`: | 1 if true

### xmlSAX2NotationDecl ()

    void	xmlSAX2NotationDecl		(void * ctx,
    					 const xmlChar * name,
    					 const xmlChar * publicId,
    					 const xmlChar * systemId)

What to do when a notation declaration has been parsed.

`ctx`: | the user data (XML parser context)
`name`: | The name of the notation
`publicId`: | The public ID of the entity
`systemId`: | The system ID of the entity

### xmlSAX2ProcessingInstruction ()

    void	xmlSAX2ProcessingInstruction	(void * ctx,
    					 const xmlChar * target,
    					 const xmlChar * data)

A processing instruction has been parsed.

`ctx`: | the user data (XML parser context)
`target`: | the target name
`data`: | the PI data's

### xmlSAX2Reference ()

    void	xmlSAX2Reference		(void * ctx,
    					 const xmlChar * name)

called when an entity xmlSAX2Reference is detected.

`ctx`: | the user data (XML parser context)
`name`: | The entity name

### xmlSAX2ResolveEntity ()

    xmlParserInputPtr	xmlSAX2ResolveEntity	(void * ctx,
    						 const xmlChar * publicId,
    						 const xmlChar * systemId)

The entity loader, to control the loading of external entities, the application can either: - override this xmlSAX2ResolveEntity() callback in the SAX block - or better use the xmlSetExternalEntityLoader() function to set up it's own entity resolution routine

`ctx`: | the user data (XML parser context)
`publicId`: | The public ID of the entity
`systemId`: | The system ID of the entity
`Returns`: | the xmlParserInputPtr if inlined or NULL for DOM behaviour.

### xmlSAX2SetDocumentLocator ()

    void	xmlSAX2SetDocumentLocator	(void * ctx,
    					 xmlSAXLocatorPtr loc)

Receive the document locator at startup, actually xmlDefaultSAXLocator Everything is available on the context, so this is useless in our case.

`ctx`: | the user data (XML parser context)
`loc`: | A SAX Locator

### xmlSAX2StartDocument ()

    void	xmlSAX2StartDocument		(void * ctx)

called when the document start being processed.

`ctx`: | the user data (XML parser context)

### xmlSAX2StartElement ()

    void	xmlSAX2StartElement		(void * ctx,
    					 const xmlChar * fullname,
    					 const xmlChar ** atts)

called when an opening tag has been processed.

`ctx`: | the user data (XML parser context)
`fullname`: | The element name, including namespace prefix
`atts`: | An array of name/value attributes pairs, NULL terminated

### xmlSAX2StartElementNs ()

    void	xmlSAX2StartElementNs		(void * ctx,
    					 const xmlChar * localname,
    					 const xmlChar * prefix,
    					 const xmlChar * URI,
    					 int nb_namespaces,
    					 const xmlChar ** namespaces,
    					 int nb_attributes,
    					 int nb_defaulted,
    					 const xmlChar ** attributes)

SAX2 callback when an element start has been detected by the parser. It provides the namespace information for the element, as well as the new namespace declarations on the element.

`ctx`: | the user data (XML parser context)
`localname`: | the local name of the element
`prefix`: | the element namespace prefix if available
`URI`: | the element namespace name if available
`nb_namespaces`: | number of namespace definitions on that node
`namespaces`: | pointer to the array of prefix/URI pairs namespace definitions
`nb_attributes`: | the number of attributes on that node
`nb_defaulted`: | the number of defaulted attributes.
`attributes`: | pointer to the array of (localname/prefix/URI/value/end) attribute values.

### xmlSAX2UnparsedEntityDecl ()

    void	xmlSAX2UnparsedEntityDecl	(void * ctx,
    					 const xmlChar * name,
    					 const xmlChar * publicId,
    					 const xmlChar * systemId,
    					 const xmlChar * notationName)

What to do when an unparsed entity declaration is parsed

`ctx`: | the user data (XML parser context)
`name`: | The name of the entity
`publicId`: | The public ID of the entity
`systemId`: | The system ID of the entity
`notationName`: | the name of the notation

### xmlSAXDefaultVersion ()

    int	xmlSAXDefaultVersion		(int version)

Set the default version of SAX used globally by the library. By default, during initialization the default is set to 2. Note that it is generally a better coding style to use xmlSAXVersion() to set up the version explicitly for a given parsing context.

`version`: | the version, 1 or 2
`Returns`: | the previous value in case of success and -1 in case of error.

### xmlSAXVersion ()

    int	xmlSAXVersion			(xmlSAXHandler * hdlr,
    					 int version)

Initialize the default XML SAX handler according to the version

`hdlr`: | the SAX handler
`version`: | the version, 1 or 2
`Returns`: | 0 in case of success and -1 in case of error.